View->Toolbars->Menu Bar

That gives you an Opera-style widget on the left side for menu functions and moves tabs to the top.

edit: And Alt will bring the normal menu into view if you need something not on the widget.

Maximize. It puts the tabs in the title bar when you maximize.

Where is this "maximize"? Is it an add-on? A button I'm not seeing?

edit: why the downvotes? I'm at work on my rickety WinXP corporate box, and FF4 definitely does not behave as described above. (Do really think I didn't try that?!)

F11

Maximize as in what your OS allows you to do.

edit: Oh, Windows XP. You'll have to disable the menu bar to get it to work there, I think.

check. That works, thanks!

this should be shipped on be default.

edit: "this" appears to be as yet undefined. Unless ... can someone point me to whatever "maximize" is?

edit: FF4 does not behave as you describe on my WinXP box at work.

Press the little button in the titlebar that makes any window fill the screen.

Note that tabs will appear in the titlebar when maximized on Windows only, for Firefox 4, and only if you have the menu bar hidden. (It's hidden by default in Windows Vista and 7.) Tabs in the titlebar are planned for Mac and Linux too, but weren't ready for this release.

For whatever reason, the voters seem to think I didn't try that before commenting. FF4 does not behave as described on my WinXP box at work.

Hm, don't know what to say. Perhaps disable the menu bar. That did it for me.

Here's what firefox 4 looks like running on windows XP: http://img855.imageshack.us/img855/460/20110322144851800x600...

they probably don't have xp anymore. works fine on 7.

To make it easier to grab the window and move it. You can maximize the window, and since you can't move it anymore once it's maximized, the tabs will move to the right of the Firefox button.

This doesn't work on Linux, due to window manager issues. Perhaps Firefox can do something like Chrome does as a workaround, although Chrome's workaround is awfully heavyweight (it basically reimplements all the functions of the WM).

I like having a title bar, I park collapsed Trillian chat windows up there and I HATE that Chrome doesn't give me space to do that. It's a UI deal breaker for Chrome for me.

It's indeed odd.

The 'title' is the meta element, that is incredibly useful! It deserves attention. Not to be lost.

That's not to say tat I don't like slim tool bars.

I also prefer uniformity across the desktop and this feels like a deviation. Much in the way that a tabbing interface was alien when opera introduced it.

I like tabs, but I'd rather my window manager work with them. But that's just me.

I'm running minefield, and I've noticed some issues in Gmail, with dragging selected text - I think the browser assumes I'm dragging and dropping. Firefox still doesn't squeeze the tab size to fit the window width, which irritates the hell out of me.

Having said that there doesn't seem to be a radical UI overhaul - which is a shame.

Not sure if they work on FF4 (yet), but there are add-ons for that, of course.

I don't mind losing the title bar, since I've long been in the habit of alt+dragging to move windows anyway.

(This is a linux-ism, but well worth installing 3rd party software on OSX/Windows for -- particularly for alt + middle/right-button resizing: no need to screw around landing your mouse on a corner of the window.)

Maximize the window AND disable the menu bar. If you don't disable the menu bar, you don't see the Firefox menu or the tabs in the title bar space.

On my little netbook this is a deal-breaker. It wastes about 1/10 of the screen.

I assume you mean you'd rather the title bar wasn't there - for your net book. Which is a fair comment.

I guess you could run the browser in full screen mode. Though full screen doesn't suit everyone.